Aluminum casting alloy
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United States of America Patent
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app pub date -
May 6, 2010
filing date -
Nov 8, 2007
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Abstract
A cast aluminum alloy contains at least five of the following alloy components: 2.5 to 3.3 wt.-% of Si; 0.2 to 0.7 wt.-% of Mg; <0.18 wt.-% of Fe; <0.5 wt.-% of Mn; <0.1 wt.-% of Ti; <0.03 wt.-% of Sr; 0.3 to 1.3 wt.-% of Cr; and <0.1 wt.-% of others, supplemented by Al to add up to 100 wt.-%. The parts cast from the alloy are preferably homogenized by annealing for 1 to 10 hours at 490° C. to 540° C. and tempered for 1 to 10 hours at 150° C. to 200° C. Preferably, the alloy is used for chassis parts in motor vehicles.
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